Installing a Viper 1002 Alarm

I have a 2004 Silverado with the LS package (power windows, mirrors and locks) and I am going to install my alarm. I can't seem to get a straight answer on weather I need an interface module for the door locks or not. Some sites say I do, Some say I don't. Any help would be great. Thanks.

I was doing some mor research. And I don't think I need the module or any other relays. I am just looking over the wiring diagrams for my truck and trying to figure it out. I don't have a factory alarm and I am not doing remote start so I don't see why I would need the interface.

The door locks are databussed is what makes the module necesary. I've installed alarms in bunches of these trucks if you want to hack it up don't use a module. If you want it to work seamlessly use a module.

Alright.. What modules have you used. I cant seem to find any more information online and everyone I call wont tell me anything over the phone. My installation booklet says there are diagrams for multiplexed door lock systems. I need help figuring this out....